Old School RuneScape (OSRS) is a massively multiplayer online role-playing game (MMORPG) developed and published by Jagex. The game was first released in 22 February 2013. When OSRS launched it was originally an exact copy of RuneScape as it was on the 10 August 2007, but has since received engine improvements, new content, and quality of life updates largely decided by in-game polls. Despite having a smaller staff and a slower relative update schedule, OSRS had more than twice the active players that RuneScape had by 2017. A mobile version of the game for Android and iOS was released in October 2018.